Well-tube perforator.



PATENTBD APR. 28, 1903.

I No. 726,625.

J. J. BRINKMAN. WELL TUBE PERPORATOR,

urmomron FILED MAR. 6,, 903

Ill/I11 vfffllllflllfllfl UNITED STATES i PATENT OFFICE.

JOHN J. BRIN-KMAN, OF BAKERSFIELD, CALIFORNIA.

WELL-TUBE PERFORATOR.

enumeration forming part of-Letters Patent No. 726,625, dated April 28, 1903.

I Application filed March 5,1903. Serial Nod 6,294. (No model.)

T at whom, it may concern:

Be'it known that 1, JOHN .LBRINKMAN, a citizen of the United States, residing at Bakersfield, in the county of Kern, State of California, have invented certain'new and useful Improvements in Well-Tube Perforators, of which the following is a specification, reference being had therein to the accompanying drawings. 7

This invention relates to a well-tube perforator, and particularly to a tool havinga cutter adapted to be automatically released when the tool has been lowered into the well-casing.

The invention has for anobjectto provide a perforator-casiug having a'diagonally-dis- M posed slot in which a cutting-tool is mounted,

said tool being normally held at one end of said slot and projected to the opposite end thereof by a coiled spring.

A further object of the invention is to improve the construction of the perforator-casing, so that all of the parts of the tool will be protected against injury when being lowered into a well, and also the structure of the cut ter to efiect a longitudinal movement thereof and also a lateral movement incident to the travel through the inclined slot in the perforator-casing. V 7

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings, Figure 1 is a vertical section through the perforator on line 1 1 of Fig. 2; Fig. 2, a similar section at a right an gle to Fig. 1 on line 2 2 thereof; Fig. 3, an elevation of the perforator-casing; Fig. 4, a similar view'of the cutting-tool; Fig. 5, a detail perspective of the spring-clasp used in connectionwith this tool, and Fig. 6 a horizontal section on the line 6 6 of Fig. 1.

Like letters of reference indicate like parts in the several figures of the drawings.

The letter A designates the perforator-casing, which maybeof any desired size or configuration desirable forthe work to be accomplished. This casing is provided with a longitudinal slot A, extending through the same, and at opposite sides thereof recesses A are formed, within which the arms B of the carrier for the cutting-tool are adapted to lie. At the lower portion of the casing A a cylinder A is applied in any desired manner and adapted to receive the tension-spring C and protectthe same in the use of-the tool. This cylinder may be attached to the casing A in any desired manner-for instance, by threading into a socket A as shown--and the lower end thereof is closed by the head A The side walls of the lower portion of the casing A are each provided with a slot A disposed diagonally to a vertical 'line extending through the casing, and at thebaseof these side walls a slot A is formed, through which the lower'ends B of the carrier B are adapted to extend into the cylinder A This tool-carrier B has the oppositeside arms thereof connected at their lower end by'a plate B from which a depending rod B extendsg'said rod being provided between its ends with a holding-groove B and at its lower end with a contact-plate B The portion of the rod B beyond the head A of the cylinder is surrounded bya spring-clasp B adapted to seat in the'groove B and retain the spring-under compressiomas shown by dotted-line posi tions in Figs'rl and 2. The spring 0 bears 'at its lower end upon the surface of the head- A and at its opposite end against an adj ustable tension-nut C, threaded upon the rod B At the upper end of the arms of the carrier B a suitable cutting-tool is provided, which may be of any preferred characte'r--for instance, a wheel D, having cutting-teeth D, said wheel being mounted upon a pivot-pin D of suitable strength, which pin passes through the diagonal slots A and also through the arms of the carrier B. Each of these arms is provided at its pivotal point with a horizontally-disposed slot' D to permit a lateral movement of the pivot in the arms incident to the lateral travel given the wheel and its pivot by reason of the diagonal slots A. This is necessary, as the cutting wheel or tool is disposed in the slot A and the carrier moves in a vertical line, so that provision for lateral movement of the wheel must be made.

In the operation of the invention the spring 0 is placed under tension by compressing the same and held in such position by the springclasp upon the rod of the tool-carrier and the perforator then lowered into the well tube or casing to be perforated. When the perforator reaches the bottom of the casing, the coni 1 u .H i 3- t, M. ,5,

tact-plate bears upon the support there found, and the weight of the perforator-casing and its connected parts forces the spring-clasp from the groove in the rod, thus tripping the spring, which by its expansion throws the cutter-wheel toward the top of the inclined slot and upward against the casing. The perforator is then raised from the bottom of the well to the point Where it is desired to form the apertures, and the cutter-wheel rolls against .the side of the casing in such upward movement without perforating the same. When the point to be out has been reached, the tool is again lowered and the tension-spring by holding the wheel in contact with the well-tube permits the weight of the perforator-casing by the inclined-slot connection with the axis of the wheel to force the latter outward through the tube, so that each cutter upon the wheel forms an aperture as it contacts with the tube. When the perforating has been effected, the tube may be raised from the well, as such movement releases the cutting-tool from the tubing. The construction here shown provides a compact tool in which there is little danger of loss of any of the parts, thereby avoiding the labor and expense necessary to remove the tool from the well and recovering the lost parts, while the structure of perforator, in connection with the diagonal slot and spring, produces means for cutting heavy tubes or drivepipes with holes sufficiently large to permit any desired flow of liquid. The invention also produces a tool simple in construction and easy of operation which can be produced at the minimum expense of manufacture.

It willbe obvious that changes maybe made in the details of construction and configuration without departing from the spirit of the invention as defined by the appended claims.

Having described my invention and set forth its merits, What I claim, and desire to secure by Letters Patent, is-

1. In a perforator, a stock provided with diagonal slots, a cutter-tool mounted in said slots, means for holding said tool at the inner end of said slots, and means for automatically projecting said tool toward the outer end of said slots.

2. In a perforator, a stock provided with diagonal slots, a cutter-tool mounted in said slots, a spring for projecting said tool to the outer end of said slots, and means for retaining said spring under tension.

3. In a perforator, a stock provided with diagonal slots therein and a central aperture, a cutting-tool mounted in said aperture bya pivot passing through said slots, acarrier for said tool having arms atopposite sides ofsaid slots connected to said pivot, a rod depending from said arms, and a tension-spring for projecting said arms upwardly.

4. In a perforator, a stock provided with diagonal slots therein and a central aperture, a cutting-tool mounted in said aperture by a pivot passing through said slots, a

carrier for said tool having arms at opposite sides of said slots connected to said pivot, a rod depending from said arms, a tensionspring for projecting said arms upwardly, a protecting-cylinder inclosing said spring and having a head bearing against the lower end thereof, and means for engaging the rod at the opposite face of said head to retain the spring under tension.

5., In a perforator, a stock provided with diagonal slots therein and a central aperture, a cutting-tool mounted in said aperture by a pivot passing through said slots, a carrier for said tool having arms at opposite sides of said slots connected to said pivot, a rod depending from said arms, a tensionspring for projecting said arms upwardly, a protecting-cylinder inclosing said spring and having a head bearing against the lower end thereof, a spring-clasp at the opposite side of said head adapted to engage a groove in said rod, and a contact-plate carried by the free end of said rod.

6. In a perforator, a stock provided with diagonal slots therein and a central aperture, a cutting-tool mounted in said aperture by a pivot passing through said slots, a carrier for said tool having arms at opposite sides of said 'slots connected to said pivot, a rod depending from said arms, a tensionspring for projecting said arms upwardly, a L

protecting-cylinderinclosing said spring and having a head bearing against the lower end thereof, a spring-clasp at the opposite side of said head adapted to engage a groove in said rod, a contact-plate carried by the free end of said rod, and means at the upper end of said arms for permitting a lateral movement of the pivot-pin therein.

7. In a perforator, a stock or casing provided with a central aperture and parallel side walls having diagonal slots therein, a cutting-tool mounted to travel in said slots, a projecting-spring for said tool disposed below said stock, and a cylinder connected to said stock at its upper end and surrounding said spring.

8. In a perforator, a stock or casing having diagonal slots therein, a toothed cuttingwheel pivotally mounted in said slots, carrier-arms for said wheel having horizontal slots at the upper ends thereof to permit a lateral movement of the wheel-pivot therein, a depending rod extending from said arms, and means for projecting said wheel to the outer portion of said diagonal slots.

9. Ina perforator, a stock or casing having diagonal slots therein, a toothed cuttingwheel pivotally mounted in said slots, carrierarms for said wheel having horizontal slots at the upper ends thereof to permit a lateral movement of the wheel-pivot therein, a depending rod extending from said arms, a coiled spring surrounding said rod, a support from said stock bearing against the lower end of said spring, an adjustable nut upon the rod to contact with the upper end of said spring, and means for retaining said upon the rod to contact with the upper end spring under compression. of said spring, a spring-clasp adapted to seat 10. In aperforator, astock or casing having in a groove formed in said rod and to bear 1 5 diagonal slots therein, a toothed cuttingagainst the under face ofsaid support, and a 5 wheel pivotally mounted in said slots, carcontact-plate carried by the free end of said rier-arms for said wheel having horizontal rod beyond said clasp. slots at the upper ends thereof to permit a In testimony whereof I affix my signature lateral movement of the wheel-pivot therein, in presence of two witnesses.

a depending rod extending from said arms, JOHN J. BRINKMAN. IO a coiled spring surrounding said rod, a sup- Witnesses:

port from said stock bearing against the ALEXANDER BURNESS,

lower end of said spring, an adjustable nut GEO. T. OLOTFELTER. 

